Updates for Overload publication

[SVN r19475]

more/error_handling.html

@@ -41,16 +41,19 @@
     guideline. After all, if you check for an error condition, then in some
     sense you expect it to happen, or the check is wasted code.</p>
 
-    <p>A more appropriate question to ask is: ``do we want stack unwinding
-    here?'' Because actually handling an exception is likely to be
-    significantly slower than executing mainline code, you should also ask:
-    ``Can I afford stack unwinding here?'' For example, a desktop application
-    performing a long computation might periodically check to see whether the
-    user had pressed a cancel button. Throwing an exception could allow the
-    operation to be cancelled gracefully. On the other hand, it would
-    probably be inappropriate to throw and <i>handle</i> exceptions in the
-    inner loop of this computation because that could have a significant
-    performance impact.</p>
+    <p>A more appropriate question to ask is: ``do we want stack
+    unwinding here?'' Because actually handling an exception is likely
+    to be significantly slower than executing mainline code, you
+    should also ask: ``Can I afford stack unwinding here?'' For
+    example, a desktop application performing a long computation might
+    periodically check to see whether the user had pressed a cancel
+    button. Throwing an exception could allow the operation to be
+    cancelled gracefully. On the other hand, it would probably be
+    inappropriate to throw and <i>handle</i> exceptions in the inner
+    loop of this computation because that could have a significant
+    performance impact.  The guideline mentioned above has a grain of
+    truth in it: in time critical code, throwing an exception
+    should <em>be</em> the exception, not the rule.</p>
 
     <h3>How should I design my exception classes?</h3>
 
@@ -184,9 +187,10 @@ extern "C" void (*old_translator)(unsigned, EXCEPTION_POINTERS*)
     usual safe assumptions that destructors and catch blocks have taken valid
     steps to ensure program invariants during unwinding. 
 
-    <p>I reluctantly concede this point to Hillel Y. Sims, who beat it into
-    me (&lt;wink&gt;): until all OSes are "fixed", if every exception were
-    derived from <code>std::exception</code> and everyone substituted
+    <p>I reluctantly concede this point to Hillel Y. Sims, after many
+    long debates in the newsgroups: until all OSes are "fixed", if
+    every exception were derived from <code>std::exception</code> and
+    everyone substituted
     <code>catch(std::exception&amp;)</code> for <code>catch(...)</code>, the
     world would be a better place.</p>
 
@@ -197,15 +201,11 @@ extern "C" void (*old_translator)(unsigned, EXCEPTION_POINTERS*)
     place where this occurs is at language boundaries.</p>
     <hr>
 
-    <p>&copy; Copyright David Abrahams 2001-2003. Permission to copy, use,
-    modify, sell and distribute this document is granted provided this
-    copyright notice appears in all copies. This document is provided "as is"
-    without express or implied warranty, and with no claim as to its
-    suitability for any purpose.</p>
+    <p>&copy; Copyright David Abrahams 2001-2003. All rights reserved.</p>
 
     <p>Revised 
     <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan -->
-     25 March, 2003<!--webbot bot="Timestamp" endspan i-checksum="34359" -->
+     6 August, 2003<!--webbot bot="Timestamp" endspan i-checksum="34359" -->
     </p>
   </body>
 </html>